Preparation method of food additive grade tricalcium phosphate
A food additive, tricalcium phosphate technology, applied in chemical instruments and methods, phosphorus compounds, inorganic chemistry, etc., can solve problems such as poor coagulation and sedimentation effect, discharge of salty wastewater, impurity trapping and adsorption, etc., and it is easy to achieve process conditions. The effect of control, low impurity content and wide source of raw materials
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Embodiment 1
[0020] (1) Dissolve 300g of calcium chloride dihydrate with 500ml of pure water, add a spoonful of activated carbon, stir well, keep warm at 50-60°C for 20 minutes, then filter and clear it in a 2-liter beaker; add 168g of sodium hydroxide with a content of 96% Dissolve with 350ml of pure water, filter and clear for later use; add 80ml of food-grade phosphoric acid with a concentration of 85% by weight and add 170ml of pure water to dilute it into 38% phosphoric acid for later use;
[0021] (2) Under stirring, the above-mentioned sodium hydroxide solution is quickly added to the calcium chloride solution through a separatory funnel for reaction. Keep stirring at ℃ for 15 minutes, let it settle for 30 minutes, siphon out the supernatant and filter it;
[0022] (3) Add pure water to the filter cake obtained in step (2) to a total volume of 1.5 liters, stir at 60-65°C for 15 minutes after stirring, take out the supernatant after standing for 30 minutes, and then suction filter; ...
Embodiment 2
[0026] (1) Dissolve 300g of calcium chloride dihydrate with 500ml of pure water, add a spoonful of activated carbon, stir well, keep warm at 50-60°C for 20 minutes, then filter and clear it in a 2-liter beaker; add 172g of sodium hydroxide with a content of 96% Dissolve with 350ml of pure water, filter and clear for later use; add 80ml of food-grade phosphoric acid with a concentration of 85% by weight and add 170ml of pure water to dilute it into 38% phosphoric acid for later use;
[0027] (2) Under stirring, the above-mentioned sodium hydroxide solution is quickly added to the calcium chloride solution through a separatory funnel for reaction. Keep stirring at ℃ for 30 minutes, let it settle for 40 minutes, siphon out the supernatant and filter it;
[0028] (3) Add pure water to the filter cake obtained in step (2) to a total volume of 1.5 liters, stir it and insulate and stir at 55-60° C. for 20 minutes, let it settle for 35 minutes, take out the supernatant and then suctio...
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